Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63c42b538d12582…

MALICIOUS

PDF

75.9 KB Created: 2021-08-13 17:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3d8215568ec41a701e69fa41a4086f5c SHA-1: 6765be4bc939753ea34fc1377b44adbc8d8020b7 SHA-256: c63c42b538d12582f469e2436f54eaefbd04367540621e9f2453dff76c4eb97c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, likely intended to lure users into downloading further malware. The embedded URLs suggest a phishing or scam attempt, possibly related to movie downloads given the UTM term.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://archism.ru/uplcv?utm_term=piratas+del+caribe+3+pelicula+completa+en+espa%C3%B1ol+latino+descargar+mega PDF link annotation
    • http://studiogiamberardino.it/userfiles/files/waludinitikex.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/f98f9fc36d4c023f4042b42dcec84c82/42420492609.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/b67d33180e3865eaca0b8a0d49cd575f/delaxizevanemomi.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6ef02b81d---mijinamepofe.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/pakinu.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160726b9658594---13566769661.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/f2960de7cd67c231067a7b42d33b0ed0/82251275800.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/wozodosowegiwojikusi.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cef53e98bc2---fojoruwoxuz.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/sumununajofopovimelameke.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/e8b5ee01c066b0a7e0b54b66465d9d51/92790570516.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/a001a6ec89222d1968d860cce1c9b54e/ximufawezimup.pdfIn PDF document text
    • http://cathayred-csr.com/img-cathay/files/povadulikonavinabes.pdfIn PDF document text
    • https://masihpt1.com/contents//files/78524325145.pdfIn PDF document text
    • https://cahayaapi1.com/contents//files/dezelibosad.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/timasimakonina.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/tetakizuluzunuvur.pdfIn PDF document text
    • https://foulardfotografando.it/file/83287935335.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5b2812577---46792320295.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/fd689a57104a42a21bafd355c3a0d59f/26973464876.pdfIn PDF document text
    • https://latework.cz/soubory/11026960041.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ec1608d2d---texudo.pdfIn PDF document text
    • http://michianaorchidsociety.org/clients/2/28/2832e32407c795c8d28ffe68102aa18e/File/7940809467.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a570a52202---39312868658.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF8D 17316 bytes
SHA-256: 68064c6049d192586ec187cdf97be713fcde032584fa32457eca25561e1d47b8
font_01_sfnt_off0000eb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7E 11476 bytes
SHA-256: 31747faa512969a3486a0d58ebccd9c41b85d2eb8110a057e2cb6f0c8bcc38b2
font_02_sfnt_off000105ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1